Car part.



W. D.-FOB,SYTH.

GAR PART.

APPLICATION FILED 1030.4,1913.

Patented Jan. 19, 1915.

FIG/7' T ESSES INVENTOR W/LL/flflia. I a/7S r7 k/L MMQ THE NORRIS PETERS 60.. PHOTO LITHOH WASHINGTON, D. C.

TED STATES PATENT @FFTQE.

WILLIAM D. FORSYTH, OF YOUNGSTOWN, OHIO, ASSIGNOR TO RAILWAY PRODUCTSCORPORATION, OF BUFFALO, NEW YORK, A CORPORATION OF NEW YORK.

CAR PART.

To all whom it may concern Be it known that I, WILLIAM D. FORSYTH, acitizen of the United States, and a resident of Youngstown, in thecounty of Mahoning and State of Ohio, have invented new and usefulImprovements in Car Parts, of which the following is a specification.

My invention relates to the parts of railway cars, such as bolsters,truck side frames, brake beams, and the like.

The principal objects of my invention is to provide a truss member for acar part which constitutes the compression and tension members of aking-post truss and which can be cheaply and easily made from a singleplate of metal.

A further object of my invention is to provide a truss member of thecharacter specified which will be strong and yet light, and which willbe slightly resilient.

Further objects of my invention are to attain certain advantages as willbe more fully set forth hereinafter.

The invention consists in a truss member for a car part in which theportions thereof are integral and are made from a single plate of metal,and which constitutes the tension and compression members of a kingposttruss.

In the accompanying drawing, which forms part of this specification, andin which like reference characters refer to like parts throughout theseveral views, Figure 1 is an end elevation of the blank from which acar part embodying my invention is made, said blank being in the form ofa slitted metal plate; Fig. 2 is a plan View of the blank shown in Fig.1, showing the slits therein; Fig. 3 is a cross-section on the line aaon Fig. 4; Fig. 4 is a plan View of the blank after flanges have beenformed along its edges and certain parts have been displaced from itsplane; Fig. 5 is a side elevation of the blank after the middle portionthereof between the slits has been stretched and displaced from theremaining portions of the blank; Fig. 6 is an end elevation of the blankafter its side portions have been bent up to form the finished trussmember; and Fig. 7 is a side elevation of the finished truss member.

In making the car truck side frame shown in the accompanying drawing,the blank 1 is formed by cutting off the corners of an oblong metalplate along straight or curved Specification of Letters Patent.

the plane of the end portions Patented Jan. 19, 1915. Serial No.804,676.

lines 2, as shown in Fig. 2. After the corners of the blank 1 are outofl', spaced slits 3 are made in said blank. These slits 3 extendlongitudinally of the blank 1 and terminate short of its ends. Theseslits 8 are shown as havlng their middle portions parallel and their endportions converging; but they may be curved or otherwise shapedaccording to the proportions of the finished car part desired. Theintermediate portion of the blank 1 is divided by the slits 3 into threelong tudinal portions consisting of two side portions 4 and a middleportion 5. The side portions 4: and the middle portion 5 are integralwith the end portions 6 of the blank 1.

The longitudinal edge portions of the blank 1 are bent along linesparallel to its longitudinal edges to form flanges .7 pro ecting fromsaid blank in the same direction. The flanges 7 may be. formed beforethe blank 1 is slitted, in order that the flang- 111g operation will notspread the slits. The longitudinal edge portions of the middle portion 5are bent along parallel lines 8 passing through the ends of the slits 3to form flanges 9 which project from the blank 1 in a direction oppositeto the direction in which the flanges 7 project. The middle portion 5 ofthe blank 1, together with its flanges 9, is stretched and displacedfrom 6 in a direction perpendicular to the plane of said blank, as shownin Fig. 5, that is, perpendicular to its own plane. The middle portion 5of the blank 1, after it has been stretched and displaced, as described,has a middle straight portion 11 which is in a plane substantiallyparallel to the plane of the end portions 6 of the blank 1, and twostraight portions 10 and 12 which incline upwardly from the ends of saidmiddle straight portion 11 to the end portions 6. The middle portion 5of blank 1 is of uniform width, and the flanges 9 thereon are widestthroughout its middle region.

After the middle portion 5 of the blank 1 has been displaced, asdescribed, (Fig. 5), the side portions 4: with the flanges 7 thereon arebent along parallel lines 13 which extend longitudinally of the blank 1,so that the flanges 7 project toward each other, as shown in Figs. 6 and7. These operations described give the truss member its finished form inwhich there is an opening 14. In the opening 14 is fixed a tie or strutmember,

not shown, to make a complete king-post truss. The truss member,hereinbelore described, constitutes the tension and compression membersof a king-post truss adapted for a car part and is made from a singleplate by cutting and bending or press ing operations whichmay beperformed by suitable presses, dies or other apparatus. The differentoperations may be performed while the metal plate is hot or cold. Themetal. where the compression and tension members of the truss memberjoin is in substantially the same condition as it was in the originalplate, and the compression and tension members are therefore morestrongly joined than if they were made from separate pieces of acorresponding size riveted or otherwise fastened together. The shape ofthe original plate, the shape of the slits and the lines of bending maybe varied so that the metal of the original plate can bedistributedthroughout the finished truss member. The particular truss member shownis designed for a car truck side frame, and the blank is so shaped,slitted and bent that the metal is distributed throughout the side frameaccording to the stresses existing therein. The compression and tensionmembers are stiffened by the flanges 7 and the flanges 9 respectively.In the construction shown and described, each flange 9 of the tensionmember lies in the same plane with one of the side portions a. Theadvantage of this last-mentioned construction is that the car part issymmetrical about a vertical median longitudinal plane, and the stressesare better distributed in it.

While for the purpose of illustration, the invention is shown asembodied in a struc- Gopies of this patent may be obtained for turewhich is particularly adapted for use as a car part, it may be used forother puroses.

The particular construction shown and described can be considerablyvaried without departing from my invention, and I do not wish,therefore, to be limited to the details of this particular construction.

What I claim as my invention is:

1. A car part made from a single piece of metal and comprising twospaced strips having flanges thereon, and of uniform width arrangedbetween said first -1nentioned strips and integral with saidfirst-mentioned strips for a portion of their lengths at their ends,said first-mentioned strips and said flanged strip having theirrespective middle portions spaced apart, said flanges of said flangedstrip being widest throughout its middle region.

2. A car part made from a single piece of metal and comprising twospaced strips and a flanged strip arranged between said firstmentionedstrips and integral with said first-mentioned strips for a portion oftheir lengths at their ends, said first-mentioned strips and saidflanged strip having their respective middle portions soread apart, eachone of said flrst-mentione strips lying a flanged strip in the sameplane with one of the flanges of said flanged strip.

In witness whereof I have hereunto subscribed my name in the presence oftwo subscribing witnesses.

WILLIAM D. FORSYTH.

Witnesses:

J. F. GALLAI-IAN, ASHLEY H. Bnoonn'rr.

five cents each, by addressing the Commissioner of Patents,

Washington, 1). C.

